Converting of cellose into fermentable sugar.



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Info Draw-iii g.

Specification of Letters Patent.

Application fiicd August 5, 1911.

"ClII'NG- Olt CELLQSE INTO FERMENTABLE SUGAR.

b all whom/{mm concern."

Bo it known that l, Pun Gos'ni Ensi'ulhu, a subject of the WIing oi? Sweden, and resident of .ivlkutslciir, in the Kingdom of Hucdcn, haw invented certain now and useit'ni liupcovcincnts in the Converting ot' tlcllosc into llci'incntable Sugar, of which the Following is a specification.

it is a humyn fact that ccllulosic mutt i'ial can ho transformed into ici'niontublc 'igifai by bcin 'g treated with an acid. The l1!\tiiljifiltlfiiiflhf the inventor uai'o proved that theccllulosc,when treated with an acid, is not directly liIfll'iSlOi'll'lkXl into sugar but that liiitlfllittlliii n'oducts arc toi'mcd. "those intcruicdiatc products are acid collulot and cclluimw. is to the nature otthoso uulmlanccs and the method of producing thcni tui'lhor information can be obtained llosc is can l)! converted into :iuole in water ci'nicntablc sugar boilcd under :itlilUSPliCl'lC pressure with a diluted acid. it can, however, not bi: tifans'toi'nuul into tci-incntahlc sugar by inluins oi a conccntiatcd :icid. Thus, in tho strong solution which is obtained whcn ii'ltlllf.;j ccllulosc with for instance sulfl lilii acid oi ill-- poi. cent the colloso 'tlill'ifiii be directly convortcd into torn'icntbio sugar, but only after ha ing hocn d1- is lllltl by l. ,i.

[lhc noi'ol feature of the present invention lltWi" conusis in diluting the strong ccllosc solution by means of the Wasto lye from Q 1o l'vlluloim tat-tor This lyo, rcsulti from the hoiliup; of wood according to will known sultito cellulose incthod, :Y' cont ani-c constituents, iron so. urous acid and a certain amount of sugar. By using for-tho StilfhPUI'POSB this Waste lye which has a rather high temperature when coming from the boilers, the advantage is gained, that, at th: some time as the strong ccllosc solution is diluted, the same is heated and its content of acid is to begin with partially and finally completely neutralized. Furtheiinoi'c, the solution is enriched with the sugar contained in the' waste sulfitc cellulose lye. FY0111 the sugar solution obtained in. this manner sugar may be obtained by evaporating the solution and crystalliziug out the sugar. Ethyl alcohol can also be obtained by fermenting the said solution and distilling oil the alcohol formed thereby.

In tho following description I cite an ai'nnlc of tho manner in which the method can be executed in practice: To liters of a (:olloso solution obtained in the above manner, I added 1000 liters of Waste sulfite cellulose lyo, The temperature of the said lyc before adding the same was 100 degrees (lent. and attc'i' the addition the mixture had a temperature of 85 degrees Cent. Boforc the addition of the Waste lye, the concentration of the acid in the collose solution was 80 per cent. and after the addition of the 'u'astc lye the acid was diluted to 2.5 per cont, Then the mixture was boiled under ordinary picssuio for a time of 1 hour. After this time the ccllose had been COIIlilctely illilllfl'ft'llnfll. into sugar, and the sugar solution obtains-d contained about 7 per cont. of sugar. I

Illa'ving; now described my invcntionpvhat- I claim as new and desire to secure by Lettoi's Patent is:

In the method of converting concentrated cclloso solutions into fermcntable sugar, diluting the said. solutions by means of Waste suliito cellulose lyes and boiling the solution thus diluted. under atmospl'leric pressure, substantially as described.

witness.whereof, it have hereunto signed my name in the presence of two subscribing Witnesses.

PER oos'm iinsiuon. 

